<template>
  <div>
    <el-upload
      class="upload-demo"
      action="https://jsonplaceholder.typicode.com/posts/"
      :on-preview="handlePreview"
      :on-remove="handleRemove"
      :before-remove="beforeRemove"
      multiple
      :limit="3"
      :on-exceed="handleExceed"
      :file-list="fileList"
    >
      <el-button
        size="small"
        type="primary"
      >点击上传</el-button>
      <div
        slot="tip"
        class="el-upload__tip"
      >只能上传jpg/png文件，且不超过500kb</div>
    </el-upload>
  </div>
</template>
<script>
export default {
  name: 'Upload',
  data () {
    return {
      fileList: []
    };
  },
  methods: {
    handleRemove (file, fileList) {
      console.log(file, fileList);
    },
    handlePreview (file) {
      console.log(file, '查看');
      var a = document.createElement('a');
      var event = new MouseEvent('click');
      a.download = file.name;
      a.href = file.url;
      a.dispatchEvent(event);
    },
    handleExceed (files, fileList) {
      this.$message.warning(`当前限制选择 3 个文件，本次选择了 ${files.length} 个文件，共选择了 ${files.length + fileList.length} 个文件`);
    },
    beforeRemove (file,) {
      return this.$confirm(`确定移除 ${file.name}？`);
    }
  }
}
</script>